Question

elements x;y;z have 4;5;7 valence electrons .write their molecular formula of the compounds formed by this elements indiviually with hydrogen​

Answer 1

Answer:

Hey mate here is your answer.

Hope it helps you.

Answer 2

Answer:

valency electrons - 4

14th group elements . They are C , Si , Ge , In , Th

Their reaction with Hydrogen are CH4 , SiH4 etc

15th group elements reaction with hydrogen

NH3 , PH3, AsH3 , SbH3, BiH3

17th group elements reaction with hydrogen are

HF , HCl , HBr ,

HI,